The Collaborative International Dictionary
Irrelative
Irrelative \Ir*rel"a*tive\, a. Not relative; without mutual relations; unconnected. -- Ir*rel"a*tive*ly, adv.
Irrelative chords (Mus.), those having no common tone.
Irrelative repetition (Biol.), the multiplication of parts
that serve for a common purpose, but have no mutual
dependence or connection.
--Owen.
Wiktionary
irrelative
a. (context archaic English) Not relative; without mutual relations; not connected.